Essential oil diffuser



FIG. 1 is a top view of a novel design of the essential oil diffuser;

FIG. 2 is a first perspective view thereof;

FIG. 3 is a second perspective view thereof;

FIG. 4 is a bottom perspective view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the drawings illustrate portions of the essential oil diffuser which form no part of the claimed design. 

CLAIM The ornamental design for an essential oil diffuser, as shown and described. 